182 REVISION OF PTEUOHELiEUS (coiltd.) AND SARAGUS, ETC, 



and have the prothorax widely rounded, with wide flat mar- 

 gins, distinctly wider than the elytra at base. 



P. dispersus Macl. — There is evidently some mistake in 

 Macleay's published dimensions, given as 5| x 3i lines. The 

 type measures 14 x 7 mm. 



P. minimus Macl., belongs to Section ii.. Sub- Section ii., 

 but was omitted by Mr. Blackburn in his tabulation of the 

 group (Trans. Roy. Soc. S. Aust. Vol. xxxi., 1907, p.291), 

 following Macleay's arrangement. 



Pterohel^us subcostatus, n.sp. 



Subparallel, black, moderately nitid ; palpi, antennae and 

 legs piceous. 



Head impunctate, epistoma truncate with sides rounded 

 and raised, limited behind by a fine semicircular suture, eyes 

 much more approximate than in P. pireus Kirby ; antennae 

 with basal joints slender, third joint little longer than fourth, 

 four apical joints transverse and successively wider, thir- 

 teenth much the largest and ovoid. 



Prothorar, 3-5 x 9 mm., length measured in middle, 

 width at base ; extreme border narrowly raised at apex and 

 sides, apex rather squarely emarginate, anterior angles pro- 

 duced beyond the eyes and widely rounded, base slightly 

 sinuate, sides moderately rounded, posterior angles acute, 

 foliate margins wide and with the disc entirely impunctate, 

 base rather deeply bifoveate, the foveas joined by a transverse 

 impression. Elytra as wide as prothorax at base, shoulders 

 angular and obtuse, sides subparallel for two-thirds of 

 length, margins wide, of almost equal width till near apex, 

 then slightly narrowed, extreme border narrowly raised ; 

 disc with humeral boss prominent, with eight equally and 

 slightly raised costae on each elytron becoming obliterated at 

 apex, besides a short scutellary costa : between each pair of 

 costae two rows of large closely set pvmctures (of about the 

 same size but more closely set than in P. pice tin Kirby), the 

 costate intervals and the suture entirely laevigate ; a single 



